What do systematic reviews say?

Staple food fortified with vitamin A plus other micronutrients vs same unfortified staple foods

The review found no eligible studies for this question.

• Fortification of staple foods with vitamin A for vitamin A deficiency 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Staple food fortified with vitamin A plus other micronutrients vs no intervention

The review found no eligible studies for this question.

• Fortification of staple foods with vitamin A for vitamin A deficiency 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Staple foods fortified with vitamin A vs same unfortified staple foods

The review found no eligible studies for this question.

• Fortification of staple foods with vitamin A for vitamin A deficiency 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Interventions targeting vehicular sources vs practice

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Low

Interventions targeting residential sources vs practice

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Very low

Interventions targeting multiple sources vs practice

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Very low

Interventions targeting industrial sources vs practice

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Low

Interventions targeting industrial sources vs practice

The review found no eligible studies for this question.

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Interventions targeting residential sources vs practice

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Very low

Interventions targeting multiple sources vs practice

The review found no eligible studies for this question.

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Interventions targeting vehicular sources vs practice

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Low

Interventions targeting residential sources vs practice

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Low

Interventions targeting vehicular sources vs practice

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Low

Interventions targeting multiple sources vs practice

The review found no eligible studies for this question.

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Interventions targeting industrial sources vs practice

• Interventions to reduce ambient particulate matter air pollution and their effect on health 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  Low

Summary of findings table ‐ LSSS intervention vs regular salt

It is very uncertain whether summary of findings table ‐ LSSS intervention changes stroke mortality (events per 100,000 person‐years) compared with regular salt (very low certainty).

• Replacing salt with low‐sodium salt substitutes (LSSS) for cardiovascular health in adults, children and pregnant women 2022 · Cochrane Headline outcomes only
  Rate ratio 0.64 [0.33, 1.25]
  2 studies · 21423 participants
  Very low

Summary of findings table ‐ LSSS intervention vs regular salt

Summary of findings table ‐ LSSS intervention showed no clear difference in cardiovascular mortality (events per 100,000 person‐years) compared with regular salt (moderate certainty).

• Replacing salt with low‐sodium salt substitutes (LSSS) for cardiovascular health in adults, children and pregnant women 2022 · Cochrane Headline outcomes only
  Rate ratio 0.77 [0.6, 1]
  3 studies · 23200 participants
  Moderate